I would like to create my own list which consists only nested numbering like this:
1.1 AAA 1.2 BBBB 1.3 CCCC When I use
\begin{enumerate} \begin{enumerate}[label*=.\arabic*,leftmargin=*,labelsep=2ex] \item First section \dotfill 3 \end{enumerate} \end{enumerate} I get error that \item is missing (of course it is correct, but I do not want to have main number only nested). How to improve this?

label*is of no use here if there is not an\itemof the parent list (i.e. outer list) so farlabel=1.to define point